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Pilot Study of Selection of Either Calcineurin Inhibitor(CNI)-Based or CNI-free Immunosuppressive Regimen Depending on the Result of Pre-transplantation Donor-specific T-cell Reactivity Measured by Enzyme-linked Immunosorbent Spot(ELISPOT) in Standard-risk Kidney Recipients.

Tacrolimus 0.1 mg/kg/12h starting as soon as treatment allocation arrives to obtain targeting troughs levels of 8-15 ng/ml the first 3 months, followed by trough levels of 5-10 ng/ml until the end of the study.

Drug: PRE-TRANSPLANT (PRE=before)

All patients will start with Thymoglobulin 1 mg/kg before transplant followed by 0,5 mg/kg/d during the next 5 days (total accumulated 3,5 mg/kg).

Steroids will be administered at 0,25 mg/kg/d until month 3rd, followed by 0,1 mg/kg/d thereafter.

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Ages Eligible for Study:

18 Years to 65 Years (Adult)

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

No

Criteria

Inclusion Criteria:

Age of donor and recipient between 18 and 65 years.

End-stage renal disease and scheduled to receive a primary or secondary renal allograft from a cadaveric, a living-unrelated, or a living-related donor. Patients scheduled for a second transplant must have maintained their primary graft for at least 6 months after transplantation, with the exception of graft failure due to technical reasons.

Treatment with aminoglycosides, amphotericin B, cisplatin, cisapride, metoclopramide, cimetidine, bromocriptine, danazol, or other drugs associated with renal dysfunction that are not discontinued prior to randomization.